SCHEDULE III Real Estate and Accumulated Depreciation - Investment in Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at beginning of year	$ 3,563,304	$ 2,570,390	$ 2,529,641
Acquisitions	0	814,765	0
Improvements	53,373	179,787	40,749
Disposals	(1,652)	(1,638)
Balance at end of year	$ 3,615,025	$ 3,563,304	$ 2,570,390